CN117577451B - Slurry for aluminum capacitor production, production method of aluminum electrolytic capacitor and nozzle - Google Patents
Slurry for aluminum capacitor production, production method of aluminum electrolytic capacitor and nozzle Download PDFInfo
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- CN117577451B CN117577451B CN202410059649.4A CN202410059649A CN117577451B CN 117577451 B CN117577451 B CN 117577451B CN 202410059649 A CN202410059649 A CN 202410059649A CN 117577451 B CN117577451 B CN 117577451B
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- 239000002002 slurry Substances 0.000 title claims abstract description 136
- 239000003990 capacitor Substances 0.000 title claims abstract description 63
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 238000000576 coating method Methods 0.000 claims abstract description 63
- 239000011248 coating agent Substances 0.000 claims abstract description 58
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000003792 electrolyte Substances 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 238000007689 inspection Methods 0.000 claims abstract description 5
- 238000012216 screening Methods 0.000 claims abstract description 5
- 239000007921 spray Substances 0.000 claims description 8
- 229920001940 conductive polymer Polymers 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 238000007581 slurry coating method Methods 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 229920005596 polymer binder Polymers 0.000 claims description 5
- 239000002491 polymer binding agent Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000006258 conductive agent Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 229920000767 polyaniline Polymers 0.000 claims description 3
- 229920000128 polypyrrole Polymers 0.000 claims description 3
- 229920000123 polythiophene Polymers 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims 1
- 238000007790 scraping Methods 0.000 claims 1
- 238000005470 impregnation Methods 0.000 abstract description 5
- 238000004891 communication Methods 0.000 description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006255 coating slurry Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010946 fine silver Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/02—Machines for winding capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
- H01G9/045—Electrodes or formation of dielectric layers thereon characterised by the material based on aluminium
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/145—Liquid electrolytic capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Manufacturing & Machinery (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention belongs to the technical field of aluminum electrolytic capacitor production, and particularly relates to slurry for aluminum capacitor production, a production method of an aluminum electrolytic capacitor and a nozzle; uniformly coating the prepared slurry on a current collector through a coating machine; cutting a current collector; nailing and rolling the cut current collector; injecting electrolyte into the rolled product, forming and assembling to prepare a capacitor; screening the capacitor; printing on the surface of the capacitor; quality inspection is carried out on the capacitor; the method realizes the combination of the impregnation process and the coating process, reduces the production difficulty of the capacitor, uniformly and flatly coats the slurry on the surface of the current collector, and ensures the quality of the manufactured capacitor.
Description
Technical Field
The invention belongs to the technical field of aluminum electrolytic capacitor production, and particularly relates to slurry for aluminum capacitor production, a production method of an aluminum electrolytic capacitor and a nozzle.
Background
In the traditional capacitor, a current collector is cut into a required size in the production process, nailing is carried out after cutting, the nailing current collector needs to be subjected to an impregnation process, and the traditional process is complicated because the current collector is directly cut without coating, so that the quality of the capacitor is difficult to control. The novel process is adopted to combine the impregnation process and the coating process, so that the production difficulty of the capacitor is reduced, and the quality of the capacitor is improved.
Therefore, based on the above technical problems, there is a need to design a new slurry for aluminum capacitor production, a method for producing an aluminum electrolytic capacitor, and a nozzle.
Disclosure of Invention
The invention aims to provide a production method of an aluminum electrolytic capacitor and a nozzle.
In order to solve the technical problems, the invention provides a slurry for aluminum capacitor production, which comprises the following components:
80% of the positive electrode conductive polymer substance, 2% of the polymer binder, 1% of the conductive agent and 17% of the solvent.
Further, the positive electrode conductive polymer substance is suitably one of polypyrrole, polythiophene and polyaniline.
Further, the polymer binder is suitably one of PVA, PVDF and SBR.
Further, the conductivity agent is suitably an ultra-fine silver paste.
Further, the solvent is suitably NMP or EC.
In a second aspect, the invention also provides a method for producing an aluminum electrolytic capacitor by adopting the slurry for producing aluminum capacitance, which comprises the following steps:
preparing slurry to be coated on a current collector;
uniformly coating the prepared slurry on a current collector through a coating machine;
cutting a current collector;
nailing and rolling the cut current collector;
injecting electrolyte into the rolled product, forming and assembling to prepare a capacitor;
screening the capacitor;
printing on the surface of the capacitor;
and (5) quality inspection is carried out on the capacitor.
Further, the current collector is suitably an anode aluminum foil.
Further, the uniformly coating the prepared slurry on the current collector by a coater comprises:
the current collector is placed on the carrier plate, the slurry is coated on the surface of the current collector by moving the carrier plate repeatedly through the nozzle of the coating machine, and the coating effect is detected in real time when the current collector is coated.
Further, a notch is formed in the lowest end of the outer wall of the nozzle along the axial direction of the nozzle, one side wall of the notch is vertically arranged, and the side wall is vertical to the current collector;
the side wall is provided with a strip-shaped hole, so that the slurry in the nozzle flows out of the strip-shaped hole;
and an inclined plane is arranged on the inner bottom surface of the strip-shaped hole.
Further, when the current collector is placed on the carrier plate, a blank part is left at the end part of the current collector from the end part of the carrier plate, and when the carrier plate passes through the nozzle, the nozzle firstly coats the blank part with slurry so as to judge whether the rate of coating the slurry by the nozzle is qualified or not;
when the current collector passes through the nozzle for the first time, coating a layer of slurry on the current collector through the nozzle to cover flaws on the current collector, so that the top surface of the slurry is flat;
after the first layer of slurry is coated on the current collector, the current collector is moved out of the lower part of the spray head through the carrier plate, and the current collector is placed for a preset time, so that the first layer of slurry is partially solidified on the current collector;
after the slurry is partially solidified, transporting the current collector to the position below the nozzle again through the carrier plate, continuously coating a second layer of slurry on the first layer of slurry, after the second layer of slurry is coated, moving the current collector out of the position below the spray head through the carrier plate, and placing the current collector for a preset time to partially solidify the second layer of slurry on the first layer of slurry;
the coating of the slurry is repeated so that the thickness of the slurry reaches a preset thickness.
In a third aspect, the invention further provides a nozzle adopted in the production method of the aluminum electrolytic capacitor, wherein a notch is formed in the lowest end of the outer wall of the nozzle along the axial direction of the nozzle, a side wall of the notch is vertically arranged, and the side wall is vertical to the current collector;
the side wall is provided with a strip-shaped hole, so that the slurry in the nozzle flows out of the strip-shaped hole;
and an inclined plane is arranged on the inner bottom surface of the strip-shaped hole.
The invention has the beneficial effects that the slurry to be coated on the current collector is prepared; uniformly coating the prepared slurry on a current collector through a coating machine; cutting a current collector; nailing and rolling the cut current collector; injecting electrolyte into the rolled product, forming and assembling to prepare a capacitor; screening the capacitor; printing on the surface of the capacitor; quality inspection is carried out on the capacitor; the method realizes the combination of the impregnation process and the coating process, reduces the production difficulty of the capacitor, uniformly and flatly coats the slurry on the surface of the current collector, and ensures the quality of the manufactured capacitor.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of producing an aluminum electrolytic capacitor of the present invention;
FIG. 2 is a schematic view of the structure of the nozzle of the present invention;
FIG. 3 is an enlarged schematic view of portion A of FIG. 2 in accordance with the present invention;
FIG. 4 is a schematic illustration of a first layer slurry coating of the present invention;
fig. 5 is a schematic illustration of a second layer slurry coating of the present invention.
In the figure:
1 a nozzle, 11 notches, 12 strip-shaped holes and 13 inclined planes;
2 current collector, 21 first layer slurry, 22 second layer slurry.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In example 1, as shown in fig. 1 to 5, this example 1 provides a paste for aluminum capacitor production, in which 80% of the paste is a positive electrode conductive polymer substance, 2% is a polymer binder, 1% is a conductive agent, 17% is a solvent, and the paste is a conductive polymer paste.
In this embodiment, the positive electrode conductive polymer material is suitably one of polypyrrole, polythiophene, and polyaniline; the polymer binder is suitably one of PVA (polyvinyl alcohol), PVDF (polyvinylidene fluoride) and SBR (styrene butadiene rubber); the conductive agent is suitable for adopting superfine silver paste; the solvent is suitably NMP (N-methylpyrrolidone) or EC (ethylene carbonate).
Example 2 this example 2 also provides, on the basis of example 1, a method for producing an aluminum electrolytic capacitor using the paste for aluminum capacitance production in example 1, comprising: preparing a slurry to be coated on the current collector 2, wherein the slurry is the slurry for aluminum capacitor production in example 1; uniformly coating the prepared slurry on the current collector 2 through a coating machine; cutting the current collector 2; nailing and rolling the cut current collector 2; injecting electrolyte into the rolled product, forming and assembling to prepare a capacitor; screening the capacitor; printing on the surface of the capacitor; quality inspection is carried out on the capacitor; the method realizes the combination of the impregnation process and the coating process, reduces the production difficulty of the capacitor, uniformly and flatly coats the slurry on the surface of the current collector 2, and ensures the quality of the manufactured capacitor.
The current collector 2 is suitably an anode aluminum foil.
In this embodiment, the uniformly applying the prepared slurry on the current collector 2 by the coater includes: the current collector 2 is placed on a carrier plate, the carrier plate is moved to repeatedly pass through a nozzle 1 of a coater, so that slurry is coated on the surface of the current collector 2, and the coating effect is detected in real time when the current collector 2 is coated; since there may be flaws on the surface of the current collector 2, the conventional coating method may cause flaws on the surface of the final slurry due to the flaws, which affects the quality of the product; firstly, coating a layer of slurry on the surface of the current collector 2 to compensate flaws, so that the surface of the first layer of slurry 21 is ensured to be smooth according with requirements, further, the subsequent remaining slurry coating is ensured to be smooth, and the quality of a product is ensured; the front and back sides of the current collector 2 can be directly coated by directly using the existing coating equipment.
In this embodiment, a notch 11 is formed at the lowest end of the outer wall of the nozzle 1 along the axial direction of the nozzle 1, a side wall of the notch 11 is vertically disposed, and a strip-shaped hole 12 is formed on the side wall perpendicular to the current collector 2, so that the slurry in the nozzle 1 flows out of the strip-shaped hole 12; the inner bottom surface of the strip-shaped hole 12 is provided with an inclined surface 13, and the inclined surface 13 can be used for conveniently guiding the slurry in the nozzle 1 out of the strip-shaped hole 12; the side wall is vertically arranged, so that the flowing slurry can be vertically coated on the current collector 2, the flowing distance of the slurry is reduced, and the coating effect of the slurry is ensured; the width of the nozzle 1 is adapted to the width of the current collector 2, one nozzle 1 can realize the coating slurry on the current collector 2, and the problem that the coating thickness cannot be accurately controlled due to the superposition of the coating areas of a plurality of nozzles 1 is avoided; a baffle plate may be provided on the strip-shaped hole 12 to control the opening or closing of the strip-shaped hole 12, the baffle plate may be driven to move by a motor, a cylinder, or the like, and the flow rate of the slurry flowing out of the strip-shaped hole 12 may be adjusted by adjusting the opening size of the strip-shaped hole 12 and/or the air pressure in the nozzle 1.
In this embodiment, when the current collector 2 is placed on the carrier plate, a blank portion is left at the end of the current collector 2 from the end of the carrier plate, and when the carrier plate passes through the nozzle 1, the nozzle 1 firstly applies slurry to the blank portion to determine whether the rate of applying the slurry by the nozzle 1 is qualified; when the current collector 2 passes through the nozzle 1 for the first time, a layer of slurry is coated on the current collector 2 through the nozzle 1 to cover flaws on the current collector 2, so that the top surface of the slurry is flat; after the first layer of slurry 21 is coated on the current collector 2, the current collector 2 is moved out of the lower part of the spray head through the carrier plate, and the current collector 2 is placed for a preset time, so that a part of the first layer of slurry 21 is solidified on the current collector 2; after a part of the first-layer slurry 21 is solidified, transporting the current collector 2 to the position below the nozzle 1 again through the carrier plate, continuing to coat the second-layer slurry 22 on the first-layer slurry 21, after the second-layer slurry 22 is coated, moving the current collector 2 out of the position below the spray nozzle through the carrier plate, and placing the current collector 2 for a preset time, so that a part of the second-layer slurry 22 is solidified on the first-layer slurry 21; repeatedly coating the slurry to enable the thickness of the slurry to reach a preset thickness; the station where the nozzle 1 is positioned is a coating station, two sides of the coating station are provided with a waiting station, when the current collector 2 is placed on the carrier plate, blank parts, namely spaces, are reserved at the two ends of the carrier plate, the blank parts of the carrier plate firstly pass through the nozzle 1 in the moving process of the carrier plate, the coating speed and the coating amount of the nozzle 1 can be detected at the moment, the coating speed and the coating amount of the nozzle 1 are adjusted to meet the coating effect required by the current collector 2, whether the surface of the current collector 2 has flaws or not is detected in a visual detection mode when the current collector 2 passes through the nozzle 1 for the first time, the flaws are compensated by regulating the slurry amount flowing out of the strip-shaped holes 12 of the nozzle 1, the surface smoothness of the first layer of slurry 21 is ensured, after the coating of the first layer of slurry 21 is finished, continuously moving the carrier plate to a waiting station, wherein the ring shape of the waiting station can be dried at a low temperature under vacuum, so that a part of slurry is solidified on the current collector 2, the slurry is viscous and cannot overflow from the current collector 2, the slurry which is not completely solidified can be conveniently combined with the next layer of slurry, after the slurry is solidified, the carrier plate is moved again to pass through the nozzle 1, the surface of the first layer of slurry 21 is sprayed with the second layer of slurry 22, after the second layer of slurry 22 is sprayed, the carrier plate is moved to another waiting station, so that a part of the second layer of slurry 22 is solidified, the thickness of the slurry reaches the required thickness repeatedly, and the surface of the final slurry cannot meet the requirement of flatness due to the defect of the current collector 2; the slurry in the blank part on the carrier plate can be scraped off at the waiting station, so that the flow of the slurry sprayed out of the nozzle 1 can be conveniently regulated in the blank part before the carrier plate passes through the nozzle 1 each time, and the thickness of each slurry coating can be regulated.
In the embodiment, after the thickness of the slurry reaches a preset thickness, the current collector 2 is cured at a high temperature, so that the slurry is ensured to be cured on the current collector 2; after the sizing agent on one side of the current collector 2 is solidified, the current collector 2 can be turned over to coat sizing agent on the other side of the current collector 2, so that the coating of the front side and the back side of the current collector 2 is realized.
In this embodiment, the collecting the current collector 2 after curing includes: the current collector 2 is collected after high-temperature curing, and the collecting mode can adopt a rolling or stacking mode.
In this embodiment, the cured current collector 2 is cut into a required size, the cut current collector 2 is nailed and welded to form a required shape and size of the capacitor, an electrolyte is injected into the nailed current collector 2 to form a liquid state or a solid-liquid mixed state, the electrolyte is converted into a process of introducing voltage under a high-temperature environment, the core package is assembled into the nailed current collector 2 after colloidal particles are assembled, the colloidal particles are integrated after being sealed by a device beam waist, the capacitor is manufactured, the capacitor is screened, qualified capacitors are screened, corresponding parameters are printed on the surface of the qualified capacitors, and the service life of the qualified capacitors is inspected.
In example 3, the front and back sides of the current collector 2 can be directly coated with the coating paste by using the conventional coating equipment.
Embodiment 4, on the basis of embodiment 2, the present embodiment 4 further provides a nozzle used in the method for producing an aluminum electrolytic capacitor in embodiment 2, wherein a notch 11 is formed at the lowest end of the outer wall of the nozzle 1 along the axial direction of the nozzle 1, a side wall of the notch 11 is vertically disposed, and a strip-shaped hole 12 is formed on the side wall perpendicular to the current collector 2, so that slurry in the nozzle 1 flows out of the strip-shaped hole 12; the inner bottom surface of the strip-shaped hole 12 is provided with an inclined surface 13.
In summary, the present invention is achieved by preparing a slurry to be coated on the current collector 2; uniformly coating the prepared slurry on the current collector 2 through a coating machine; curing after the slurry coating is completed; collecting the current collector 2 after solidification; the slurry is uniformly and smoothly coated on the surface of the current collector 2, and the quality of the manufactured electrolytic capacitor is ensured.
The components (components not illustrating specific structures) selected in the application are all common standard components or components known to those skilled in the art, and the structures and principles of the components are all known to those skilled in the art through technical manuals or through routine experimental methods.
In the description of embodiments of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. A method for producing an aluminum electrolytic capacitor using a paste for aluminum capacitor production, comprising:
preparing slurry to be coated on a current collector;
uniformly coating the prepared slurry on a current collector through a coating machine;
cutting a current collector;
nailing and rolling the cut current collector;
injecting electrolyte into the rolled product, forming and assembling to prepare a capacitor;
screening the capacitor;
printing on the surface of the capacitor;
quality inspection is carried out on the capacitor;
when the current collector is placed on the carrier plate, a blank part is left at the end part of the current collector from the end part of the carrier plate, and when the carrier plate passes through the nozzle, the nozzle firstly coats slurry on the blank part to judge whether the rate of coating the slurry by the nozzle is qualified or not;
when the current collector passes through the nozzle for the first time, coating a layer of slurry on the current collector through the nozzle to cover flaws on the current collector, so that the top surface of the slurry is flat;
after the first layer of slurry is coated on the current collector, the current collector is moved out of the lower part of the spray head through the carrier plate, and the current collector is placed for a preset time, so that the first layer of slurry is partially solidified on the current collector;
after the slurry is partially solidified, transporting the current collector to the position below the nozzle again through the carrier plate, continuously coating a second layer of slurry on the first layer of slurry, after the second layer of slurry is coated, moving the current collector out of the position below the spray head through the carrier plate, and placing the current collector for a preset time to partially solidify the second layer of slurry on the first layer of slurry;
repeatedly coating the slurry to enable the thickness of the slurry to reach a preset thickness;
when the current collector is placed on the carrier plate, a blank part is left at the end part of the current collector from the end part of the carrier plate, and when the carrier plate passes through the nozzle, the nozzle firstly coats slurry on the blank part to judge whether the rate of coating the slurry by the nozzle is qualified or not; when the current collector passes through the nozzle for the first time, coating a layer of slurry on the current collector through the nozzle to cover flaws on the current collector, so that the top surface of the slurry is flat; after the first layer of slurry is coated on the current collector, the current collector is moved out of the lower part of the spray head through the carrier plate, and the current collector is placed for a preset time, so that a part of the first layer of slurry is solidified on the current collector; after a part of the first layer of slurry is solidified, transporting the current collector to the lower part of the nozzle again through the carrier plate, continuously coating the second layer of slurry on the first layer of slurry, after the second layer of slurry is coated, moving the current collector out of the lower part of the spray head through the carrier plate, and placing the current collector for a preset time to enable a part of the second layer of slurry to be solidified on the first layer of slurry; repeatedly coating the slurry to enable the thickness of the slurry to reach a preset thickness; the method comprises the steps that a station where a nozzle is located is a coating station, two sides of the coating station are provided with a waiting station, when a current collector is placed on a carrier plate, blank parts are reserved at two ends of the carrier plate, namely, a space is reserved, the blank parts of the carrier plate pass through the nozzle in the moving process of the carrier plate, the coating speed and the coating amount of the nozzle are detected at the moment, the coating speed and the coating amount of the nozzle are adjusted to meet the coating effect required by the current collector, when the current collector passes through the nozzle for the first time, whether flaws exist on the surface of the current collector are detected in a visual detection mode, the flaws are compensated by regulating the amount of slurry flowing out of strip holes of the nozzle, the surface smoothness of a first layer of slurry is ensured, the carrier plate is continuously moved to the waiting station after the coating of the first layer of slurry is finished, the carrier plate passes through the nozzle after the slurry is solidified, a second layer of slurry is sprayed on the surface of the first layer of slurry, and the carrier plate is moved to another waiting station after the second layer of slurry is sprayed, so that part of the second layer of slurry is solidified, and the thickness of the slurry is repeatedly enabled to reach the required thickness; and scraping the slurry in the blank part on the carrier plate at the waiting station, so that the flow of the slurry sprayed out of the nozzle is adjusted in the blank part before the carrier plate passes through the nozzle each time, and the thickness of each slurry coating is adjusted.
2. The method of claim 1, wherein:
the current collector is suitably an anode aluminum foil.
3. The method of claim 2, wherein:
the uniformly coating the prepared slurry on the current collector through a coating machine comprises the following steps:
the current collector is placed on the carrier plate, the slurry is coated on the surface of the current collector by moving the carrier plate repeatedly through the nozzle of the coating machine, and the coating effect is detected in real time when the current collector is coated.
4. A method of producing as claimed in claim 3, wherein:
a notch is formed in the lowest end of the outer wall of the nozzle along the axial direction of the nozzle, one side wall of the notch is vertically arranged, and the side wall is vertical to the current collector;
the side wall is provided with a strip-shaped hole, so that the slurry in the nozzle flows out of the strip-shaped hole;
and an inclined plane is arranged on the inner bottom surface of the strip-shaped hole.
5. A slurry for aluminum capacitor production used in the method for producing an aluminum electrolytic capacitor as recited in claim 1, comprising:
80% of the positive electrode conductive polymer substance, 2% of the polymer binder, 1% of the conductive agent and 17% of the solvent.
6. The aluminum capacitance production slurry according to claim 5, wherein:
the positive electrode conductive polymer substance is suitable for one of polypyrrole, polythiophene and polyaniline.
7. The aluminum capacitance production slurry according to claim 5, wherein:
the polymeric binder is suitably one of PVA, PVDF and SBR.
8. The aluminum capacitance production slurry according to claim 5, wherein:
the conductivity agent is suitable for adopting superfine silver paste.
9. The aluminum capacitance production slurry according to claim 5, wherein:
the solvent is suitably NMP or EC.
10. A nozzle used in the production method of an aluminum electrolytic capacitor as recited in claim 1, characterized in that:
a notch is formed in the lowest end of the outer wall of the nozzle along the axial direction of the nozzle, one side wall of the notch is vertically arranged, and the side wall is vertical to the current collector;
the side wall is provided with a strip-shaped hole, so that the slurry in the nozzle flows out of the strip-shaped hole;
and an inclined plane is arranged on the inner bottom surface of the strip-shaped hole.
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| CN202410059649.4A CN117577451B (en) | 2024-01-16 | 2024-01-16 | Slurry for aluminum capacitor production, production method of aluminum electrolytic capacitor and nozzle |
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| CN101303938A (en) * | 2007-05-09 | 2008-11-12 | 郑州泰达电子材料科技有限公司 | Solid electrolytic capacitor |
| CN105355840A (en) * | 2015-10-20 | 2016-02-24 | 四川科能锂电有限公司 | Coating and rolling-in all-one-one machine for electrode |
| CN112424894A (en) * | 2018-07-18 | 2021-02-26 | 凯米特电子公司 | Hybrid capacitor and method for manufacturing capacitor |
| CN113675361A (en) * | 2021-08-12 | 2021-11-19 | 文保华 | Device and method for preparing double-gap multi-gap and multi-tab of battery pole piece |
| CN116897404A (en) * | 2020-08-20 | 2023-10-17 | 基美电子公司 | Hybrid capacitor with improved ESR stability |
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2024
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303938A (en) * | 2007-05-09 | 2008-11-12 | 郑州泰达电子材料科技有限公司 | Solid electrolytic capacitor |
| CN105355840A (en) * | 2015-10-20 | 2016-02-24 | 四川科能锂电有限公司 | Coating and rolling-in all-one-one machine for electrode |
| CN112424894A (en) * | 2018-07-18 | 2021-02-26 | 凯米特电子公司 | Hybrid capacitor and method for manufacturing capacitor |
| CN116897404A (en) * | 2020-08-20 | 2023-10-17 | 基美电子公司 | Hybrid capacitor with improved ESR stability |
| CN113675361A (en) * | 2021-08-12 | 2021-11-19 | 文保华 | Device and method for preparing double-gap multi-gap and multi-tab of battery pole piece |
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| CN117577451A (en) | 2024-02-20 |
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